Social norms are a set of behavioral norms that re-flects the common values,expectations,and beliefs shared by most society members,which is helpful to solve social chaos and keep the society functioning well.Understanding social norms and the improve-ment of norm-related processes are of great signifi-cance to children's social development,adjustment,and further entering into adulthood.Effective social interaction with others provides an important context for norm-related processes.The present review dis-cussed the potential bidirectional link between inter-personal interaction(i.e.,parent-child interaction and peer interaction)and social norm-related pro-cesses in early childhood.On one hand,preschool-ers'social norms have a strong role model from their parents.The pattern of parent-child interaction can affect preschoolers'norm acquisition and compli-ance.Preschoolers'perceived group norms and the social motivation when interacting with peers can in-fluence their social norm acquisition and enforce-ment.On the other hand,preschoolers'norm devel-opment can promote parent-child interaction and peer interaction by enhancing social cognition abili-ties,following normative information,and maintaining reputation.Future directions should focus on 1)in-vestigating the relation between social interaction and various types of social norms to explore the mecha-nisms underlying them and their influencing factors;2)developing the paradigm with high ecological va-lidity to provide direct evidence;3)conducting inter-personal neuroscience studies of social norms among children in early childhood;and 4)designing inter-ventions for favorable social norms in normal children and exceptional children.
social normsocial interactionnorm acquisitionnorm developmentearly child-hood